Improvement in alloys of copper and tin



UNITED STATES PATENT QFFICE.

IMPROVEMENT IN ALLOYS OF COPPER AND TIN.

Specification forming part of Letters Patent No. 118,372, dated August22, 1871.

To all whom it may concern:

Be it known that I, ALEXANDRE ETIENNE LAVROFF, of St. Petersburg,Russia, a colonel in the artillery guard, have invented Improvements inCompounds or Alloys of Copper and Tin, of which the following is adescription My invention consists in an alloy or bronze, into thecomposition of which tin, copper, and phosphorus enter in definiteproportions, viz., phos-, phorus, 1 per cent.; tin, 19 per cent; copper,80 per cent.

In compounding the alloy I first fuse the tin 19 per cent, or 94.5, andphosphorus l per cent, or 5.5.

This mass is added to the copper to form the

